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API Tapered Thread software

Gagemaker's TDWIN Taper software simplifies the API specifications that control connection quality. TDWIN Taper produces dimensional drawings and inspection data for API downhole tubular connectors based on the most current industry standards. All the necessary details to machine, inspect and document tubular connection threads are available in one convenient program.

TDWIN Taper provides easy access to information for both preferred and non-preferred Rotary Shouldered Connections, Tubing and Casing Connections, and any combination of Crossover. The program offers standard connection types and sizes. It displays connection drawings, inspection gage information, and setup and inspection reports.

The software displays printable drawings suitable for manufacturing. The drawings follow ASME Y14.5 standards for industry compatibility. Print gage setup and inspection reports with your company logo and work order information. The program offers the choice to save reports and jobs for future reference.

Includes Connection Data for:

Rotary Shouldered Connections

  • Slimline H-90
  • External Flush
  • ACME Regular
  • ACME Streamline
  • Double Streamline
  • PAC
  • Slim Hole
  • Wide Open
  • eXtra Hole
  • H-90
  • API Numbered Connections
  • API Regular
  • Full Hole
  • Internal Flush
  • Open Hole

Tubing and Casing Connections

  • NUE Tubing
  • EUE Tubing
  • Short Thread Casing
  • Long Thread Casing
  • USS Improved Buttress Tubing
  • Line Pipe
  • Special Clearance Couplings
  • SR13 Seal Ring Groove Couplings

System Requirements

  • Windows XP or higher
  • 1 MB RAM or more (recommended)
  • Screen resolution of 1024 X 768 minimum
  • USB 2.0 port (The program runs entirely from a flash drive.)
  • Active Internet connection
  • .Net Framework 2.0 or later installed


  • Follows API Specification 7.2, Dec. 2008, for Rotary Shouldered Connections
  • Follows API Specification 5B, Oct. 2008, for Tubing and Casing Connections
  • Presents “preferred” connections as well as interchangeable and obsolete
  • connections
  • Organizes data compatible with API and industry knowledge offered by
  • resources such as Smith, Joy, and Hughes
  • Displays Gagemaker style thread gages and gage setting information
  • Configures and prints reference drawings for manufacturing including:
    • standard pin/box/coupling
    • pin/box blanking
    • pin/box relief groove
    • box modified bore-back relief
    • special clearance couplings
    • SR grooved couplings
  • Produces gage setup reports for tubing, casing, RSC, and crossover  combinations
  • Provides inspection reports for all connection configurations selected
  • Customizes reports with your company logo
  • Saves reports to job files and recalls them for future reference
  • Provides web links to locate and purchase necessary gages and standards
  • Compact custom Flash Drive


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TDWIN Taper Software TDWIN Taper Opening Screenshot
TDWIN TAPER Software Opening Screen
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